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17

Defining a JPA Entity Class

(annotated) as having the ability to represent objects in the database. Conceptually this is similar to serializable classes, which are marked as having the ability to be serialized. The Point Entity
17

JPA Criteria API Queries

). FROM clause (from, join, fetch). WHERE clause (where). GROUP BY / HAVING clauses (groupBy, having
12

FROM clause (JPQL / Criteria API)

,DELETE, DESC, DISTINCT, ELSE, EMPTY, END, ENTRY, ESCAPE, EXISTS, FALSE, FETCH,FROM, GROUP, HAVING, IN
12

JPA Query Expressions (JPQL / Criteria)

Query expressions are the foundations on which JPQL and criteria queries are built. Every query consists of clauses - SELECT, FROM, WHERE, GROUP BY, HAVING and ORDER BY, and each clause consists of JPQL / Criteria query expressions. Atomic Expressions The atomic query expressions are: JPQL
12

DELETE Queries in JPA/JPQL

multiple variables and JOIN, and cannot include the GROUP BY, HAVING and ORDER BY clauses
12

Privacy Policy

and to avoid You having to re-enter your preferences every time You use the Website. Analytics
12

Query Parameters in JPA

a parameter in a Criteria API query. The reason for having nine set methods rather than just
12

CRUD Database Operations with JPA

the results (using an ORDER BY clause) and even group results (using GROUP BY and HAVING clauses). JPQL
12

UPDATE SET Queries in JPA/JPQL

queries cannot include the GROUP BY, HAVING and ORDER BY clauses, but the WHERE clause
1

[ODB1] Chapter 8 - ObjectDB Server

is found, the new configuration is loaded automatically without having to restart the server. To turn

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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